What are some alternatives to OpenCL?

What is OpenCL and what are its top alternatives?

It is the open, royalty-free standard for cross-platform, parallel programming of diverse processors found in personal computers, servers, mobile devices and embedded platforms. It greatly improves the speed and responsiveness of a wide spectrum of applications in numerous market categories including gaming and entertainment titles, scientific and medical software, professional creative tools, vision processing, and neural network training and inferencing.

OpenCL is a tool in the Language Extensions category of a tech stack.

Top Alternatives to OpenCL

CUDA
A parallel computing platform and application programming interface model,it enables developers to speed up compute-intensive applications by harnessing the power of GPUs for the parallelizable part of the computation. ...
OpenGL
It is a cross-language, cross-platform application programming interface for rendering 2D and 3D vector graphics. The API is typically used to interact with a graphics processing unit, to achieve hardware-accelerated rendering. ...
OpenCV
OpenCV was designed for computational efficiency and with a strong focus on real-time applications. Written in optimized C/C++, the library can take advantage of multi-core processing. Enabled with OpenCL, it can take advantage of the hardware acceleration of the underlying heterogeneous compute platform. ...
Xtend
It is a flexible and expressive dialect of Java, which compiles into readable Java 8 compatible source code. You can use any existing Java library seamlessly. The compiled output is readable and pretty-printed, and tends to run as fast as the equivalent handwritten Java code. ...
Helix
Helix allows you to write Ruby classes in Rust without having to write the glue code yourself. ...
PostSharp
It adds design patterns and thread safety to C# and VB so you can avoid boilerplate and focus on business value. ...
Cursive
It is the Clojure(Script) IDE that understands your code. Advanced structural editing, refactorings, VCS integration and much more, all out of the box. ...